I tried electric fans when I still had my 1989. I was very dissatified with the results. They never worked as well as the stock setup and neither did my A/C. The best upgrade I found was to buy a new fan, shroud, and clutch and re-install them.
Some will tell you the stock system uses a lot of power. It can, but only uses that much when you need it to keep the engine cool. And when you need that much cooling, no electric fan can supply it. most of the time the clutch is just barely engaged, and not drawing several horsepower.